LG GC-B207GLQV Bedienungsanleitung

CAUTION

PLEASE READ CAREFULLY THE SAFETY PRECAUTIONS OF THIS BOOK

BEFORE CHECKING OR OPERATING THE REFRIGERATOR.

REFRIGERATOR

SERVICE MANUAL

http://biz.lg vice.comres

SALES MODEL:GC-B207GLQV

WARNINGS AND PRECAUTIONS FOR SAFETY ............................................................................................... ..................... 3

................. ...........................................................................................................................................14

SPECIFICATIO SN

PARTS IDENTIFICATION....................................................................................................................................................... .15

HOW TO INSTALL THE REFRIGER ATOR .................................................................................................................... 16

MICOM FUNCTION ..............................................................................................................................................................17-19

EXPLATION FOR MICOM CIRCUIT.....................................................................................................................................20-32

62-02 ..............................................................................................................................TIUCRICBWPROFNOITANALPXE

COMPENSATION CIRCUIT FOR WEAK-COLD, OVER-COLD 92-72 ................................................MOORGNIZEERFTA

13-03..............................................................................................................................TSILDNAGNIWARDSTRAPBWP

23...........................................................................................................................................................................TIUCRIC

19-353................................................................................................................................................SISONGAIDELBUORT

26-35 ...................................................................................................................................................GNITOOHSELBUORT

97-36..........................................................................................................................................................................STLUAF

68-08..............................................................................................................................RIAPERYVAEHELCYCGNILOOC

19-78....................................................................................................................................SMIALCHTIWLAEDOTWOH

HOW TO DISASSEMBLE AND ASSEMBLE ..................................................................................................................... 92-93

DOOR...............................................................................................................................................................................92

HANDLE ...........................................................................................................................................................................93

EXPLODED VIEW ..............................................................................................................................................................94-98

CONTENTS

- 2 -

COMPRESSOR .................................................................................................................................................................. 4-7

......................................................................................... 8-13

Heavy Repair Method of Refrigerator by Application of Refrigerant

MICOM ERR 15-33 ...................................................................................................................................................EDOCRO

ERROR CODE SUMMARY ...........................................................................................................................................

33-34

TROUBLE SHOOTING WITH ERROR .....................................................................................................................

35-52

Please observe the following safety precautions in order to

use safely and correctly the refrigerator and to prevent

accident and danger during repair.

1. Be care of an electric shock. Disconnect power cord

from wall outlet and wait for more than three minutes

before replacing PWB parts. Shut off the power

whenever replacing and repairing electric components.

2. When connecting power cord, please wait for more than

five minutes after power cord was disconnected from the

wall outlet.

3. Please check if the power plug is pressed down by the

refrigerator against the wall. If the power plug was

damaged, it may cause fire or electric shock.

4. If the wall outlet is over loaded, it may cause fire. Please

use its own individual electrical outlet for the refrigerator.

5. Please make sure the outlet is properly earthed,

particularly in wet or damp area.

6. Use standard electrical components when replacing

them.

7. Make sure the hook is correctly engaged.

Remove dust and foreign materials from the housing

and connecting parts.

8. Do not fray, damage, machine, heavily bend, pull out,

or twist the power cord.

9. Please check the evidence of moisture intrusion in the

electrical components. Replace the parts or mask it

with insulation tapes if moisture intrusion was

confirmed.

10. Do not touch the icemaker with hands or tools to

confirm the operation of geared motor.

11. Do not let the customers repair, disassemble, and

reconstruct the refrigerator for themselves. It may

cause accident, electric shock, or fire.

12. Do not store flammable materials such as ether,

benzene, alcohol, chemicals, gas, or medicine in the

refrigerator.

13. Do not put flower vase, cup, cosmetics, chemicals,

etc., or container with full of water on the top of the

refrigerator.

14. Do not put glass bottles with full of water into the

freezer. The contents shall freeze and break the glass

bottles.

15. When you scrap the refrigerator, please disconnect the

door gasket first and scrap it where children are not

accessible.

WARNINGS AND PRECAUTIONS FOR SAFETY

- 3 -

Chapter 8 Compressor

1. Inverter Linear Compressor

Check for defect of the inverter linear compressor in following orders:

1-1. Method to Measure Compressor Winding Resistance

Normal Determination Criteria

The compressor winding resistance can be determined as normal if resistance values show the values as described in below figure

when measuring resistance values of the harness (connected with compressor) to connect Connect201(CON201) of the main PWB

as shown in below figure.

Defect Determination Criteria

Check connection status of the Compressor Connection Harness-P(Lead Wire) which is located at the M/Croom where resistance

values measured at the CON201 Housing are shown as infinite or several hundred . Separate connecting wires of the M/C room

(A-point in Figure) and then measure resistance values at the connecting wires again. The compressor can be determined as

normal if resistance values are shown as standard resistance value.

Check connection status of a harness.

(Defect at M/C room connection contact or CON201 Housing contact, short-circuit of harness)

Where resistance values measured at A-point are also shown as infinite or several hundred , disassemble a coverPTC of the

compressor terminal and check the terminal connecting status at the B-point in Figure.

Where there is no failure in the wiring status and resistance values are shown as infinite or several hundred , it may be

determined as defect of compressor.

Since if there is no failure in resistance values of the compressor, it may be defectiveMain PWB, replace the Main PCB and check

for normal operation of the compressor.

When determining any defect through resistancemeasuring, it can be determined as normal if resistance values show as descried

in the below figure by measuring①power and ③common terminal

resistance values are measured when measuring①power but measuring is meaningless since they cannot become

criteria for determining defect (measuring not required).

Caution

1. Be sure to powering off the refrigerator and measure after several minutes has passed.

2. If not accurately measuring resistance, wrong determination may be guided. (Difference of resistance value of several W or so may

occur.)

COMPRESSOR

●

-4-

1-2.Method to Determine Defect of Inverter Linear Drive

Determination of Comp Operation

Separate the back cover at the rear of refrigerator and determine for possible operation while touching the compressor with thehands

with insulation gloves worn.

Comp Operation

- Determine possible trip by checking operation status if cold air comes out after opening the doors of the R-Room.

Protective Logic (Trip)

- To protect the compressor from abnormal operation, this logic is used to temporally stop the refrigerator when abnormal operation

occurs and to re-operate it after abnormal signal disappears.

COMPRESSOR

Division operation condition Delay time LED time

Stroke Trip Stroke > 16.8mm 1mintue 2times

Current Trip Running Cap. voltage

voltage

Vcap > 540Vrms ( 59.5Hz 1.82Arms, 61Hz 1.86Arms) 6 mintues 6times

Lock Piston Trip Stroke < 5mm, Running Capacitor Vcap > 300V (= 1Arms)2.3mintues 5times

Overload Protection 运转频率61Hz, 以Stroke 限制运转状态连续运转5小时0second

0second

4times

IPM Fault IPM Send Fault signal to IPM 7times

-5-

Fuse Inspection

- Visually inspect for fuse broken.

- When a fuse is destroyed, visually inspect for breaking of IPM and IC209 and additionally check it with a multi-test.

Inverter Parts Inspection

- Visually inspect for breaking of IPM and IC209 and additionally check it with a multi-test (check for short).

Bridge Diode Inspection

- Bridge diode is considered as destroyed if value of10W or less is shown in every case when measuring resistance with a multi-test

for 2 terminals of 4 diode terminals.

※Power should be turned on again after checking all parts because series of detects may occur when powering on in a simple parts

defect status for parts defect related with an inverter.

COMPRESSOR

-6-

Parts Defect Determination in Power On Status

Check of Power Application

-Check that supply power of +15V, +8V used as supply power of digital circuits is normally applied.

COMPRESSOR

+15V +8v

Measuring part

D202 Pin2-GND D203 Pin2-GND

Normal 13V-15.5V 7V-9V

Defect 13V or less 7V or less

Measures Replace board Replace board

-7-

Chapter 9 Heavy Repair Method of Refrigerator by Application of

Refrigerant

1. Outline

1-1. Checkpoints before Heavy Repair

Open the Cover ASM, Back-M/C of refrigerator and check the type of refrigerant indicated on a compressor before starting work.A

yellow label is adhered to the compressor for the refrigerator using R600a as refrigerant.

1-2. Features of R600a Refrigerant

Non-polar natural gas refrigerant (CH(CH3)3)

Since R600a is same series as butane gas, there is danger of fire when discharged into air at appropriate concentration (extreme

handling is required for heavy repair of cycle).

Explosion concentration: .8% ~ 8.4%/Vol.

Burning temperature: 494℃

1-3. Features of R600a Refrigerator

With refrigerant quantity of 60% or so for the refrigerator using R134a as refrigerant

Large vacuum level at suction pressure (at low pressure side)

COMP capacity of the refrigerator using R609a as refrigerant is large by 1.7 times than that of the refrigerator using R134a.

Labels as in Figure are displayed at the compressor of a refrigerant for R600a and the back plate of refrigerator.

1-4. Location and Environment for Heavy Repair

Check that drafting and air ventilation are well done at a working area and perform work after making drafting and air ventilation

smooth (use refrigerant return bag indoors).

Check that there are fire appliances or heating source around the working area and then remove them before work.

Since R600a refrigerant is very inflammable, they should not be discharged indoors.

Be sure to follow heavy repair SVC procedures during work.

1-5. Heave Repair Work Tool

R600a refrigerant

Bombe

Pinch Pliers

Refrigerant Discharge Hose

Refrigerant Return Bag

Vacuum Pump

Handy Welding Machine

Charging Tube

Leakage Tester

Drier

Heavy Repair Method of Refrigerator by Application of Refrigerant

Insulation Blowing Gas : Cyclopentane

15mm

●

-8-

2. Heavy Repair SVC Method

For the heaver repair of R600a type of refrigerator, perform work according to following SVC method.

2-1. Returnof Refrigerator Refrigerant

Required equipment: Pinch pliers, refrigerant discharging hose, refrigerant returnbag

Take power cords out and remove power between 6sec through 12sec after powering ON to open all both sides of 3way valve.

Leave doors of a refrigerator so that they are not closed.

Connect pinch pliers with a refrigerant discharging hose.

Place the outlet of a refrigerant discharging hose outside.

(Remove fire appliances or heating sources near a refrigerant discharging hose.)

Always use a refrigerant returnbag for working at the contained space.

Bore the charging pipe of a compressor with pinch pliers.

(Remove fire appliances or heating sources near a refrigerator.)

Perform refrigerant discharge for more than 7 minutes.

Heavy Repair Method of Refrigerator by Application of Refrigerant

●

-9-

2-2. Returnof Remained Refrigerant

Required equipment: Pinch pliers, hose for refrigerant recovery, vacuum pump

If refrigerant returntime of 7 minutes has passed, connect a vacuum pump at the ends of a

refrigerant returnhose outdoor. (Vacuum pump must operate outdoor.)

Operate a vacuum pump in order to returnrefrigerant remained in the pipe.

Vacuum working time should be for more than 10 minutes.

2-3. Welding Repair Step

Required equipment: Simple welding machine

Remove pinch pliers if remaining refrigerant returnis completed.

Cut the front part of a process pipe with a cutter. (Check that remaining refrigerant comes out.)

Perform welding work such as replacement of compressor and dryer, or repair of leakage part. (Be cautious of fire during welding

work.)

Heavy Repair Method of Refrigerator by Application of Refrigerant

●

-10-

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